DM2504 Technical Summary

Overview

The DM2504 is a 12-bit TTL register designed specifically for use in successive approximation analog-to-digital (A/D) converters. It is part of a family that includes the DM2502 (8-bit) and DM2503 (8-bit) variants, all of which provide the necessary logic and control circuits to interface with digital-to-analog (D/A) converters for high-performance A/D conversion. The DM2504 is engineered to support both short-cycle and expanded operation modes, making it versatile for a wide range of applications.

This device is compatible with D/A converters using any logic code and offers flexible output configurations, including active low or active high logic outputs. Additionally, it can be repurposed as a general-purpose serial-to-parallel converter or ring counter, further enhancing its utility in digital systems.

Features

• Complete Logic for A/D Conversion: Integrates all necessary control circuits for successive approximation A/D converters.
• 12-Bit Register: Provides high-resolution data storage for precision applications.
• Flexible Operation Modes: Supports both short-cycle and expanded operation for timing flexibility.
• Continuous or Start-Stop Operation: Adaptable to varying system requirements.
• D/A Converter Compatibility: Works seamlessly with D/A converters using any logic code.
• Configurable Logic Outputs: Active low or active high outputs for versatile interfacing.
• Multi-Functional: Can be used as a general-purpose serial-to-parallel converter or ring counter.
• Multiple Package Options: Available in dual-in-line (DIP) and flat packages for diverse PCB layouts.

Applications

The DM2504 is ideal for a variety of applications, including but not limited to:

• Successive Approximation A/D Converters: Provides the core logic and register functionality for high-speed, high-resolution analog-to-digital conversion.
• Data Acquisition Systems: Enables precise digitization of analog signals in industrial and scientific instrumentation.
• Digital Control Systems: Facilitates feedback loops and signal processing in automated control applications.
• General-Purpose Digital Logic: Can be repurposed as a serial-to-parallel converter or ring counter in digital circuits.
• Test and Measurement Equipment: Supports high-accuracy signal measurement and analysis.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): 7V
• Input Voltage: 5.5V
• Operating Temperature Range: 0°C to +70°C (Commercial), -55°C to +125°C (Military)
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (Vcc): 4.75V to 5.25V
• High-Level Input Voltage (Vih): 2.0V min
• Low-Level Input Voltage (Vil): 0.8V max
• Clock Frequency: Up to 10MHz (typical)

DC Electrical Characteristics

• High-Level Output Voltage (Voh): 2.4V min @ Ioh = -400µA
• Low-Level Output Voltage (Vol): 0.4V max @ Iol = 8mA
• Input Leakage Current (Iin): ±10µA max
• Supply Current (Icc): 40mA max @ Vcc = 5.25V

AC Electrical Characteristics

• Propagation Delay (Clock to Output): 30ns max
• Setup Time (Data to Clock): 20ns min
• Hold Time (Data to Clock): 5ns min

Package Information

The DM2504 is available in multiple package options to accommodate different design requirements:

• DM2504J / DM2504CJ: 24-pin ceramic dual-in-line package (DIP), NS Package J24A.
• DM2504CN: 24-pin plastic dual-in-line package (DIP), NS Package N24A.
• DM2504F / DM2504CJ: 24-pin flat package, NS Package F24D.

Package Dimensions

• J24A (Ceramic DIP): 0.600" wide, 1.200" long, 0.220" pin spacing.
• N24A (Plastic DIP): 0.600" wide, 1.200" long, 0.100" pin spacing.
• F24D (Flat Package): 0.300" wide, 1.000" long, 0.050" lead pitch.

Thermal Characteristics

• Thermal Resistance (θja): 80°C/W (Ceramic DIP), 100°C/W (Plastic DIP).
• Maximum Power Dissipation: 500mW @ 25°C free air temperature.

Conclusion

The DM2504 is a highly versatile and reliable 12-bit TTL register designed for successive approximation A/D converters. Its robust feature set, flexible operation modes, and compatibility with various D/A converters make it an excellent choice for precision data conversion applications. With multiple package options and reliable electrical performance, the DM2504 is well-suited for both commercial and military-grade systems.